Definite support. Not sure about the runner, if I sold something expensive it would be a heck of a lot of profit out of the chunk... but nice idea.
The advisor would be nice, and as an additional suggestion for those of us curious, perhaps have the advisor calculate how much all of you bank is worth.
Epic idea. This would make banks a bit more deep and realistic. I don't like the GE Runner though, part of the Grand Exchange balancing factors is the fact that you have to be there to make offers, that's why you can't use it at any old bank unless you're collecting your earnings. Other then that part, I love your suggestion.